Name the complex polysaccharide which does not synthesize in the Golgi apparatus?
A.
Starch
B.
Hemicellulose
C.
Glycosaminoglycans
D.
Pectins
Answer: Option A
Explanation:
Complex polysaccharides are also synthesized in the Golgi apparatus such as hemicellulose and pectin in the cell wall of plant and glycosaminoglycans in the extracellular matrix of animals.
Which of the following hypothesis explain vesicle fusion?
A.
Lipid raft hypothesis
B.
SNARE hypothesis
C.
Cell adhesion hypothesis
D.
Cell kill hypothesis
Answer: Option B
Explanation:
Snare hypothesis explains the vesicle fusion with target mediated by the interaction of specific proteins called SNAREs (Snape receptors). V-SNARE is present on vesicle while t-SNARE is present on the target.
Name the GTPase which control the recognition of interactions between v-SNARE and t-SNARE?
A.
Rac protein
B.
Ras protein
C.
Rab protein
D.
Rho protein
Answer: Option C
Explanation:
Rab protein attached with the surface of the vesicle; when vesicle encounter with target membrane, the binding of v-SNARE and t-SNARE causes vesicle to bound the membrane and allow the Rab protein to hydrolyze its bound GTP.
Which of the following ATPase dissociate SNARE apart?
A.
V-ATPase
B.
F-ATPase
C.
P-ATPase
D.
NSF
Answer: Option D
Explanation:
Once the vesicle fusion to target membrane is done, the complex dissociates with the help of NSF (NEM sensitive factor), which is a soluble ATPase that hydrolyses ATP and separate SNAREs.